Rock-drill



(No Model.)

F. MANNING.

ROCK DRILL. No. 337,968. Patented Mar. 16, 1886.

lllllu WTNESSES:

ATTORNEY.

einen.,

FRANK MANNING, OF ARDMORE, PENNSYLVANIA.

ROCK-DRILL.

SPECIFICATION forming part of Letters Patent No. 337.968, dated March16, 1886.

Serial No. 176,051. (No model.)

To @ZZ whom t may concern:

Be it known that I, FRANK MINNING, a citizen of the United States,residing in Ardmore, county of Montgomery, State o'fPennsylvania, haveinvented anew and useful Improvement in Bock-Drills, which improvementis fully set forth in the following` specification and accompanyingdrawings, in which- Figures 1 and 2 represent side elevations of arock-drill embodying my invention. Fig.

43 represents a horizontal section thereof in line xx, Fig. l.

Similar letters of reference indicate corresponding parts in the severalgures.

My invention consists of a roclrdrill or quarrying machine provided withmeans whereby the bits are powerfully struck and reliably rotated andpossessing other advantages, as will be hereinafter fully set forth.

Referring to the drawings, A represents the frame of the rock-drill, andB represents a power or driving wheel mounted on the upright portionthereof. v

C represents a rotary-shaft, which extends vertically, and is mounted incross-heads DD D2 of the drill or machine. Projecting from said shaft Care arms or pins E, which are adapted to be engaged by lateral projections c on the side of a cam, F, the latter being secured to or formedwith the drivingvwheel B, whereby the rotation of said cam with thewheel imparts rotary motion to the shaft C.

G represents a ram or hammer, which is guided in uprights of the frameA, and connected at top with an upright stem, H, to which is secured anarm, J, so disposed that it may be engaged by the cam F on the wheel B.

K represents bits or cutters, which are tted at their upper ends intoheads L, said bits and heads being properly guided in the lower part ofthe frame A, the heads being beneath the ram G, so as to be struck bythe same. The heads have connected with them pinions or gear-wheels M,which mesh with each other, one of the pinions meshing with a pinion, N,on the lower end of the shaft C, it now being evident that the rotationof the shaft @causes rotation of the heads L and consequently of thebits K. The connection ofthe wheels M and heads L is by means offeathers, whereby said heads may move vertically in said wheels or riseand fall therein.

It will be seen that when power is applied to the wheel B the cam Fengages with the arm J, thus raising the ram G, and also with the armsE, thus rotating the shaft C, and owing to the gearing N rotating thebits. lVhen the cam F clears the arm J, the stem H is no longercontrolled by the cam, and the ram drops, its forcible descent beingassisted by a spring, H, which bears downwardly against the arm J, ormay bear against any suitable part of the stein or ram, and a powerfulblow is imparted to the heads L and consequently to the bits K. The ramis then raised and the bits are elevated by springs K and rotated, afterwhich the ram again drops, causing the bits to eut to a greater depth,and the operations are repeated and continued as desired, the blows ofthe ram increasing in power as the depth ofI the holes increases.

The base portion of the carriage is mounted on rollers P, whosebearing-stemsQare passed through said base and pierced to receive pinsS, whereby the frame may be raised and lowered in order to adj ust thedepth of penetration of the bits.

In order to guide the machine true during the drilling operation, thereis attached to the base portion of the frame an arm or bar, T, in whichare fitted pins U, which, after the first set of holes are drilled, aredropped thereinto, and the next set of holes are drilled, said pins areraised, the drill or machine is moved, and the pins are dropped intothelast-nanied holes, and thus the guiding of the machine is continued,as desired.

Having thus described my invention. what I claim as new, and desire tosecure by Letters Patent, is-

l. The driving-wheel B, having cam F, with projection c on the side ofthe said cam, in combination with the vertical rotary shaft C, providedwith suitable bearings and having horizontal arms E, and gears forrotating a series of drills, substantially as and for the purpose setforth.

2. rlhe wheel B, with cam F, having lateral projections c, and rotaryshaft C, having horizontal projections E, adapted to engage the saidprojections a, and thereby operate a series of drill-rotating gears, incombination with hammer G, having vertical stem H, provided With arm J,and spring H, substantially as and for the purpose set forth.

3. Arotary wheel having a cam, in combination with a vertical rotaryshaft having pins thereon adapted to be brought in contact with lateralprojections on said cam,4 and a hammer having a handle with projectingarm, the latter by its Contact, with the cam of the wheel imparting arising and falling motion to the said hammer, substantially asdescribed.

4. The bit K, in combination with the frame A, head L, with feather,Wheel M, mounted on the head A, pinion N, mounted on thev shaft C, theshaft C, having horizontal

